IDENTIFICATION OF AN R-LOCUS REGION THAT CONTROLS THE TISSUE SPECIFICITY OF ANTHOCYANIN FORMATION IN MAIZE
[摘要] The R locus in maize controls the tissue specificity of anthocyanin formation. Recombination between two different R -locus alleles with unique pigmentation domains has resulted in the generation of a nonparental allelic type that displays a third kind of tissue specificity. These novel changes in tissue specificity occurred in very low frequency (1 x 10-5). In light of this finding and of recent results concerning the regulation by R of the enzyme UDPG: flavonoid 3- O -glucosyltransferase, specified by the Bz locus, a model dealing with the genetic control of tissue-specific functions in multicellular organisms is proposed.
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[效力级别] [学科分类] 医学(综合)
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